کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1800897 1024550 2010 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of post-sintering annealing on microstructure and coercivity of Al85Cu15-added Nd–Fe–B sintered magnets
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Effect of post-sintering annealing on microstructure and coercivity of Al85Cu15-added Nd–Fe–B sintered magnets
چکیده انگلیسی

Effects of post-sintering annealing on the microstructure and coercivity have been investigated for the Al85Cu15-added (Pr, Nd)14.8Fe78.7B6.5 sintered magnets. It is found that the optimum annealing temperature at which the coercivity iHc reaches a maximum decreases from 550 °C for the magnets added with 0.3% and 0.6% Al85Cu15 to 480 °C for the magnets added with 0.9% and 1.2% Al85Cu15. The decrease in optimum annealing temperature is related to the precipitation of Al–Cu or (Pr, Nd)−Cu liquid phase among (Pr, Nd)-rich phases during annealing. Existence of Al–Cu or (Pr, Nd)−Cu liquid phase is beneficial to dissolve the irregularities of (Pr, Nd)2Fe14B grain interface and increase the quantities of (Pr, Nd)-rich phases at the grain boundary, thus optimizing the grain boundary microstructure. The modifications of the microstructure are helpful to decouple the exchange interaction between (Pr, Nd)2Fe14B hard magnetic grains, thereby increasing the coercivity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 322, Issue 22, November 2010, Pages 3710–3713
نویسندگان
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